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Lecture 4

Lecture 4 - Today Today ’ ’ s class s class z Halloween...

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Unformatted text preview: Today Today ’ ’ s class: s class: z Halloween candy are available for the starving: Í (one at a time, please) z Cell phones off now, please z Today: chapter 2 “Light and Matter…” z Reminder: reading quiz #1 is posted on the class web site: 15 multiple choice questions due Monday 10 p.m. Units of Chapter 2 9 Information from the Skies 9 Waves in What? The Electromagnetic Spectrum Thermal Radiation Spectroscopy The Formation of Spectral Lines The Doppler Effect Spectral-Line Analysis 9 2.1 Information from the Skies Wave motion : transmits energy without the physical transport of material 9 2.1 Information from the Skies Example: water wave Water just moves up and down Wave travels and can transmit energy 9 2.1 Information from the Skies Frequency : number of wave crests that pass a given point per second Period : time between passage of successive crests Relationship: Period = 1 / Frequency Example: if 10 wave crests pass in a second, then it takes 1/10 of a second for each to pass 2.1 Information from the Skies Wavelength: distance between successive crests Velocity : speed at which crests move Relationship for all types of waves: Velocity = Wavelength * Frequency 2.2 Waves in What?...
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Lecture 4 - Today Today ’ ’ s class s class z Halloween...

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